Condenser unit for refrigerating apparatus



S. MOORE March 7, 1933.

Filed April 21, 1952 samura MOORE, or BUFFALO, EW YORK,

Patented Mar. 7,1933

UN TED STATES PATENT OFF are FEDDERS MANUFACTURING ASSIGNOR COMPANY, INC., Oil-BUFFALO, NEW YORK connmvsnn UNIT FOR REFRI'GERATING APPARATUS Applieation filed April 21,

My invention relates to heat exchange devices, and it has particular reference to a heat exchange unit adapted for use as a condenser in a refrigerating system.

Refrigerating apparatus, particularly intended for use in domestic or household refrigeration, frequently includes a pump or compressorfor compressing volatile liquid, aeondenser for cooling the compressed gas or liquid,and an evaporator in which the cooled liquidis allowed to expand and gasify with concomitant absorption of heat. A typical type of condenser includes a continuous tubing orpipe, provided with fins, through which the compressed refrigerant may travel. Thepresent invention is directed to'the construction of a'heat exchange unit, suitable for use as a condenser,and it contemplates the provision of a rugged and durableunit of apparatus, which maybe made with economies in manufacture and assembly without sacrificein effectiveness.

A typical embodiment of the invention is shown in the accompanying drawing, where- Fig. 1 is a perspective view of the condenser unit, certain portions thereof being broken away to show the frame structure.

Fig. 2 is a longitudinal section through the frame, showing the coil unit being inserted therein.

Fig. 3 is a perspective of a fragment of the unit frame.

As shown in Fig. 1, the condenser comprises a continuous pipe 10, having spaced ortions 11 and 12, each of which is formed y bending the pipe or tubing back on itself a number of times, to define a plurality of spaced straight pipe sections 13, connected at their extremities by alternately disposed return bends 14 and 15. One extremity 16 of the portion 11 projects outwardly, and it provides a section adapted to be'connected to the compressor or evaporator of the system. The other extremity 17 of the portion 11 is bent at right angles to the several sections 13 to provide a' straight length of pipe by means of which the portions 11 and 12 are connected. The configuration of the portion 12 is similar to that of the portion 11,

1932. Serial No. 606,640.

and the free or extreme end 18 thereof is bent back over the section 17 for a short distance, to provide a coupling portion for the evaporator or compressor. The several straight lengths of pipe 13 and 17 all lie in substantially the same horizontal plane, and the pipe 10 therefore defines a pair of spaced portions whose edges are defined onone side by a number ofreturn bends 15, and on the opposite side by a number of staggered returnbends 14 and the connecting section 17. j Each section 13 of the tubing 10 is provided with oppositelydisposed and longitudinally from corrugated continuous lengths of metallic ribbon, and which are soldered or otherwise secured to the sections 13 to form a bank from which the bends l4 and 15 project. In making the tubing and afilxing the fins thereto, the tubing 10 is first cut to the required length as a straight piece, the portions which are to form the sections 13 are marked off, and the fins are soldered to these portions. Thereafter, the various bends 14 and 15 are formed, to bring the tubing 10 into the configuration just described. 1

The tubing structure, just described, is mounted in a frame 22, tocomplete the condenser unit. This frame is made from one or more sections of sheet metal of adequate weight, and, in the form illustrated, it consists of a continuous member having sides 23 and 24, a back 25, and a front 26. The sides 23 and 24 are substantially continuous over their surfaces, and the marginal portions are formed with inwardly projecting top and bottomfianges 27 and 28. The frame 22 is provided with portions adapted to removably receive the tube unit, which portions comprise a pair of spaced ledge portions 29 struck out of the back 25 and forming slots 31 therein. The front 26 is formed with a pair of notched portions 32 which are opposed to the ledge portions 29 and are each provided with a plurality of ledge portions 33, 34 andinterposed lugs 35.

Referring to Fig. 2, it will be observed that the described tube unit, wherein the aligned return bends extending fins 21, which are formed 7 portion and an opposite adapted to engage on the rear of the sections 11 and 12 are entered in the slots 31 until the fin bank abuts the face of the back 25. The front of the tube unit is subsequently dropped in position in the notched portions 39. of the front 36 of the frame, with the bends 14 in the portions 10 and 11 engaging the ledge portions 33 and being retained against lateral movement by the spacing lugs 35. Simultaneously, the connecting section 17 engages about the exterior of the central portion of the front 26 and its extremities engage the narrower ledges 34. The extremities 16 and 18 similarly engage on the remaining narrower ledges 34:.

The tube unit thus inserted in the frame is locked against displacement by securing members 36. These members are rectangular strips formed at one end with a flange 87 the face of the front 26. The bottom margins of these members rest on the tops of the lugs 35 while the opposite ends engage through slots 37 formed in the flanges 27 of the sides 23 and 24:. These members are secured in this position in any suitable manner, such as by soldering. It will also be observed that the opposite extremities of the fin bank form shoulders which abut the inner faces of the front and back 26 and 25 to prevent the longitudinal movement of the tube unit in its mounting.

I claim:

1. A condenser comprising a rectilinear frame having one wall formed with a slotted wall formed with a marginal notch, a tube unit having one extremity engaging through the slotted portion of said first wall and having its opposite extremity resting in the marginal notch of said opposite wall, and means secured to said opposite wall for closing the open side of the notch to retain the tube unit against removal.

2. A condenser comprising a rectilinear frame having one wall formed with a slotted portion and an opposite wall formed with a marginal notch, a tube unit having one extremity engaging through the slotted portion of said first wall and having an opposite extremity resting in the marginal notch of said opposite wall, means secured to said opposite wall for closing the open side of the notch to retain the tube unit against upward removal and means on the tube unit engaging the inner faces of said first and opposite walls to retain the unit against longitudinal movement,

3. A condenser comprising a tube unit formed of a plurality of convolutions of tubing providing a substantially rectangular member, fin means secured to the tube unit, said fin means terminating in spaced relation to opposite ends of the tubing convolutions, a frame having opposite wall portions V formed to removably receive the opposite ends of the tubing convolutions, means secured to the frame for retaining the tube unit against upward displacement, said fin means abutting the inner faces of said walls to retain the tube unit against longitudinal movement.

4. A condenser comprising a tube unit formed of a plurality of coplanar convolutions of tubing, providing a substantially rectangular member, a rectilinear frame having one wall formed with a slotted portion for receiving the common ends of said convolutions at one extremity of said unit, said frame having an opposite wall formed with a marginal notched portion for receiving the opposite ends of said convolutions, said notched portion having a plurality of spaced lugs engaging between the convolutions of said tubing to retain the same in spaced relation, and means secured to said opposite wallfor closing the open side of the notched portion to retain the tube unit against upward movement.

5. A condenser comprising two spaced and connected sections, each section comprising a plurality of coplanar convolutions of tubing, a frame having one wall formed with a pair of spaced slotted portions for receiving the common extremities of said connected sections, and an opposing wall formed with a pair of spaced marginal notched: portions for receiving the opposite common extremities of said sections, each notched portion having a plurality of spacing lugs engaging between the convolutions of each section to retain the same in spaced relation, and means secured to said opposing wall for closing the open sides of the notched portion to retain the sections therein against upward displacement.

SAMUEL MOORE. 

